Servo System Adjustments; Cap Fg Offset Adjustment (Vc-195 Board); Switching Position Adjustment (Vc-195 Board) - Sony Handycam CCD-TR57 Service Manual

3-3.

SERVO SYSTEM ADJUSTMENTS

1. CAP FG Offset Adjustment (VC-195 board)

Improve the capstan servo characteristic. If it is not correct. jitters
will increase.
Mode Camera recording (SP mode)
Subject Arbitrary
Pin !™ of CN910 (CAP FG)
Measurement Point
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 69
Specified value Duty = 50±1%
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 01, and set data: 81, and press the PAUSE
button of the adjustment remote commander. (to start up
automatic CAP FG offset adjustment.)
3) Select page: 2, address: 02, and check that the data is "01".
4) Check that Duty of CAP FG signal satisfies the specified value.
If not, select page: 2, address: 01, set data: 00, and press the
PAUSE button, and then, repeat steps 2) to 4).
5) Select page: 2, address: 01, and set data: 00, and press the PAUSE
button of the adjustment remote commander.
6) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-5.

2. Switching Position Adjustment (VC-195 Board)

If deviated in this case causes switching noise or jitter on the played
back screen.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting Method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: F, address: 2A, and set data: 20, and press the PAUSE
button of the adjustment remote commander.
3) Select page: F, address: 7C, change the data and minimize "t1",
and then press the PAUSE button of the adjustment remote
commander. (Coarse adjustment)
4) Select page: F, address: 7D, change the data and adjust so that
the switching position (t1) becomes the specified value. (Fine
adjustment)
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: F, address: 2A, and set data: 00, and press the PAUSE
button of the adjustment remote commander.
7) Select page: 0, address: 01, and set data: 00.
5-37
Playback
Alignment tape:
For tracking adjustment
(WR5-1NP)
CH1: Pin !¡ of CN910 (RF SWP)
CH2: Pin 6 of CN910 (PB RF)
Oscilloscope
F
7C, 7D
t1 = 0±10µsec
Fig. 5-3-6.